72390742 has 8 divisors (see below), whose sum is σ = 110073816. Its totient is φ = 35699472.

The previous prime is 72390733. The next prime is 72390749. The reversal of 72390742 is 24709327.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 72390698 and 72390707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72390749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247768 + ... + 248059.

It is an arithmetic number, because the mean of its divisors is an integer number (13759227).

Almost surely, 2^72390742 is an apocalyptic number.

72390742 is a deficient number, since it is larger than the sum of its proper divisors (37683074).

72390742 is a wasteful number, since it uses less digits than its factorization.

72390742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495902.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 72390742 is about 8508.2749132830. The cubic root of 72390742 is about 416.7679777823.

The spelling of 72390742 in words is "seventy-two million, three hundred ninety thousand, seven hundred forty-two".